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Title: Origins of the isospin violation of dark matter interactions

Abstract

Light dark matter (DM) with a large DM-nucleon spin-independent scattering cross section and moreover proper isospin violation (ISV) f{sub n}/f{sub p} ≈ −0.7 may provide a way to understand the confusing DM direct detection results. Further using the stringent astrophysical and collider constraints, we systematically investigate the origin of ISV first via general operator analyses and further via specifying three types of mediators: a light Z' from chiral U(1){sub X}, an approximate spectator Higgs doublet (It can explain the W+jj anomaly simultaneously) and color triplets. In addition, although Z' from an exotic U(1){sub X} mixing with U(1){sub Y} generates only f{sub n} = 0, we can combine it with the conventional Higgs to achieve the proper ISV. As a concrete example, we propose the U(1){sub X} model where the U(1){sub X} charged light sneutrino is an inelastic DM, which dominantly annihilates to light dark states such as Z' with sub-GeV mass. The model can consistently (with other DM direct detection results) and safely interpret the recent GoGeNT annual modulation result.

Authors:
; ;  [1]
  1. Key Laboratory of Frontiers in Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190 (China)
Publication Date:
OSTI Identifier:
22279613
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2013; Journal Issue: 01; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; APPROXIMATIONS; ASTROPHYSICS; CHIRALITY; COLOR MODEL; COSMOLOGY; CROSS SECTIONS; GEV RANGE; HIGGS BOSONS; HIGGS MODEL; ISOSPIN; MASS; NONLUMINOUS MATTER; NUCLEONS; SPIN; TRIPLETS; U-1 GROUPS; VISIBLE RADIATION

Citation Formats

Gao, Xin, Kang, Zhaofeng, and Li, Tianjun. Origins of the isospin violation of dark matter interactions. United States: N. p., 2013. Web. doi:10.1088/1475-7516/2013/01/021.
Gao, Xin, Kang, Zhaofeng, & Li, Tianjun. Origins of the isospin violation of dark matter interactions. United States. https://doi.org/10.1088/1475-7516/2013/01/021
Gao, Xin, Kang, Zhaofeng, and Li, Tianjun. 2013. "Origins of the isospin violation of dark matter interactions". United States. https://doi.org/10.1088/1475-7516/2013/01/021.
@article{osti_22279613,
title = {Origins of the isospin violation of dark matter interactions},
author = {Gao, Xin and Kang, Zhaofeng and Li, Tianjun},
abstractNote = {Light dark matter (DM) with a large DM-nucleon spin-independent scattering cross section and moreover proper isospin violation (ISV) f{sub n}/f{sub p} ≈ −0.7 may provide a way to understand the confusing DM direct detection results. Further using the stringent astrophysical and collider constraints, we systematically investigate the origin of ISV first via general operator analyses and further via specifying three types of mediators: a light Z' from chiral U(1){sub X}, an approximate spectator Higgs doublet (It can explain the W+jj anomaly simultaneously) and color triplets. In addition, although Z' from an exotic U(1){sub X} mixing with U(1){sub Y} generates only f{sub n} = 0, we can combine it with the conventional Higgs to achieve the proper ISV. As a concrete example, we propose the U(1){sub X} model where the U(1){sub X} charged light sneutrino is an inelastic DM, which dominantly annihilates to light dark states such as Z' with sub-GeV mass. The model can consistently (with other DM direct detection results) and safely interpret the recent GoGeNT annual modulation result.},
doi = {10.1088/1475-7516/2013/01/021},
url = {https://www.osti.gov/biblio/22279613}, journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 01,
volume = 2013,
place = {United States},
year = {2013},
month = {1}
}